US Benefit - Health plans (dependent coverage) - URGENT, any link?

Employee can have their children covered under the medical and dental plans until they are the age of 19 or 23 if children are in school full time.

But situation arises if an employee has medical coverage and elections one of the options but picks employee + 1 and has a child as a dependant that is age 23. When the child turns 24, the benefits automatically end for the child and this appears to be the case on SAP.

Question though is the benefit election should also change to EMPLOYEE only......